Patents by Inventor Reisuke Nakagawa
Reisuke Nakagawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20200326888Abstract: An apparatus, in response to a data write request, writes target data to a first memory. During data movement from the first memory to a second memory, the apparatus stores first data included in the target data in the first memory, stores second data obtained by excluding the first data from the target data in the second memory, and deletes the second data from the first memory. In response to a data read request from a data requesting source, the apparatus reads the first data from the first memory and transfers the first data to the data requesting source while moving the second data from the second memory to the first memory.Type: ApplicationFiled: April 8, 2020Publication date: October 15, 2020Applicant: FUJITSU LIMITEDInventors: REISUKE NAKAGAWA, Maki Matsubara
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Publication number: 20180232312Abstract: A control device includes a first and a second control devices, the first control device is configured to transmit second data to the second control device at a first time, receive a first notification from the second control device at a second time, transmit the second data to a storage device at a third time, receive a second notification from the storage device at a fourth time, select a first or a second mode based on a comparison of the first period from the first time to the second time and the second period from the third time to the fourth time, in the first mode, transmit the first data to the second control device and the storage device, receive the first notification, transmit a processing completion notification, in the second mode, transmit the first data to the storage device, receive the second notification, transmit the processing completion notification.Type: ApplicationFiled: February 1, 2018Publication date: August 16, 2018Applicant: FUJITSU LIMITEDInventors: Hidekazu KAWANO, Hiroaki Konno, Takeshi Ueda, Hiroshi Koarashi, Hiroshi CHIBA, Hitomi Akiyama, Kenji Higuchi, REISUKE NAKAGAWA
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Publication number: 20160357479Abstract: A storage control apparatus is provided that includes a storage unit and a control unit. The storage unit is configured to store management information indicating a formatting status of each of a plurality of partitions included in a storage area. The control unit is configured to perform a procedure including: upon receiving a write request to write first data to the storage area, determining whether a partition including a region to which the first data is to be written is formatted, based on the management information; and when the partition is unformatted, generating third data with a size that matches a size of the partition by combining the first data and predetermined second data, and writing the third data to the partition.Type: ApplicationFiled: June 1, 2016Publication date: December 8, 2016Applicant: FUJITSU LIMITEDInventors: Hiroshi Koarashi, Shimpei Ogino, Hitomi Akiyama, Takeshi Ueda, Kenji Higuchi, Meiu Naruse, REISUKE NAKAGAWA, Hiroaki Konno
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Publication number: 20160070490Abstract: A storage control device includes a processor. The processor is configured to acquire history information on access to multiple logical volumes which are configured using multiple storage devices. The processor is configured to determine from among the multiple logical volumes, on basis of the acquired history information, a preferred logical volume on which restoration processing is preferentially performed. The processor is configured to restore the preferred logical volume stored in a first storage device to be restored among the multiple storage devices into a spare storage device other than the multiple storage devices using restoration data read from the multiple storage devices except for the first storage device.Type: ApplicationFiled: July 27, 2015Publication date: March 10, 2016Applicant: FUJITSU LIMITEDInventors: Hiroshi KOARASHI, Hitomi Akiyama, Mikio ITO, kenji higuchi, MASAAKl SUGIYAMA, Meiu Naruse, Takeshi Ueda, REISUKE NAKAGAWA
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Patent number: 8819364Abstract: An acquisition unit of an information processing apparatus acquires access information indicating the state of access to a volume of a disk device at least for data read. A determination unit detects a volume in which a sequential read was performed, on the basis of the acquired access information, and determines the volume as a backup source for a backup.Type: GrantFiled: September 19, 2011Date of Patent: August 26, 2014Assignee: Fujitsu LimitedInventors: Hiroyuki Watanabe, Hideaki Takahashi, Takashi Hirose, Kinya Saito, Reisuke Nakagawa
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Publication number: 20140082308Abstract: According to an aspect of the present invention, provided is a storage control device including a processor. The processor monitors a load value of a first storage device or a second storage device during copy processing in which a copy of data stored in the first storage device is stored in the second storage device. The processor controls, in a case where the load value exceeds a predetermined threshold, the first storage device and the second storage device so that input/output processing to/from the second storage device is executed with priority over the copy processing.Type: ApplicationFiled: July 30, 2013Publication date: March 20, 2014Applicant: FUJITSU LIMITEDInventors: Meiu NARUSE, Reisuke Nakagawa, Kenji Higuchi, Hiroyuki Shimoi, Hitomi Akiyama, Hiroshi Koarashi
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Patent number: 8549244Abstract: A data copying device that copies data stored in a first data storage device to a second data storage device is disclosed. The data copying device includes a data reading unit that reads data that has an amount determined based on a number of a plurality of logical volumes included in the first data storage device storing the data to be copied and an amount of data to be transferred from each of the logical volumes, a storage unit that stores the data read by the data reading unit, and a data transfer unit that transfers the data stored in the storage unit to the second storage device.Type: GrantFiled: July 13, 2011Date of Patent: October 1, 2013Assignee: Fujitsu LimitedInventors: Kenji Higuchi, Eiichi Yamanaka, Reisuke Nakagawa
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Patent number: 8238204Abstract: In order to facilitate the management of the hardware key of a library apparatus employing the LTO system, a write function of a noncontact memory (CM: cartridge memory) contained in an LTO tape cartridge is implemented in a medium carrying mechanism part of the library apparatus, and during an insertion to a tape drive, the IDs unique to a library control part and to the medium carrying mechanism part are recorded in the non-contact memory and utilized as the hardware key of an encrypting apparatus. The hardware key written once is overwritten (erased) during an ejection, thereby preventing leakage of key information.Type: GrantFiled: September 14, 2007Date of Patent: August 7, 2012Assignee: Fujitsu LimitedInventors: Yoshiharu Itou, Kinya Saito, Kenichi Utsumi, Reisuke Nakagawa, Hitomi Akiyama, Ichirou Sakuma, Hiroyasu Inagaki
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Publication number: 20120084501Abstract: An acquisition unit of an information processing apparatus acquires access information indicating the state of access to a volume of a disk device at least for data read. A determination unit detects a volume in which a sequential read was performed, on the basis of the acquired access information, and determines the volume as a backup source for a backup.Type: ApplicationFiled: September 19, 2011Publication date: April 5, 2012Applicant: FUJITSU LIMITEDInventors: Hiroyuki Watanabe, Hideaki Takahashi, Takashi Hirose, Kinya Saito, Reisuke Nakagawa
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Publication number: 20120017057Abstract: A data copying device that copies data stored in a first data storage device to a second data storage device is disclosed. The data copying device includes a data reading unit that reads data that has an amount determined based on a number of a plurality of logical volumes included in the first data storage device storing the data to be copied and an amount of data to be transferred from each of the logical volumes, a storage unit that stores the data read by the data reading unit, and a data transfer unit that transfers the data stored in the storage unit to the second storage device.Type: ApplicationFiled: July 13, 2011Publication date: January 19, 2012Applicant: FUJITSU LIMITEDInventors: Kenji Higuchi, Eiichi Yamanaka, Reisuke Nakagawa
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Publication number: 20110202716Abstract: A storage system includes: storage devices storing data and varying in data-writing speed; a cash memory storing the write data until the write data is written to the storage device; a storage section that stores the write data received from an external device in the cash memory; and a writing section that takes the write data from the cash memory and writes the taken write data to the storage device. The storage section stores the write data received from the external device, in a storage area according to the type of the storage device to which the write data is to be written, among storage areas resulting from division according to the types of the storage devices. The writing section sequentially takes the write data from the storage area sequentially selected from among the storage areas on the cash memory and writes the taken data to the storage device.Type: ApplicationFiled: January 21, 2011Publication date: August 18, 2011Applicant: FUJITSU LIMITEDInventor: Reisuke NAKAGAWA
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Patent number: 7768733Abstract: Disclosed is a method, for erasing data from a magnetic tape storage medium (92) housed in a cartridge (86) containing a memory in which are stored the last written track position (yy) of the last written, most recent information and the last track position (xx) of past information written in the past and remaining unerased, comprising: the step of reading out of the memory (91) the last written track position of the most recent information and the last track position of the past information; the step (S124) of determining whether the data should be erased up to the last written track position of the most recent information or up to the last track position of the past information; and the step (S126, S128) of erasing the data up to the determined position, thereby shortening the data erase time of the magnetic tape while completely solving a security problem by making provisions to completely erase the data of the most recently written information or the data of the past information written in the past and reType: GrantFiled: July 8, 2005Date of Patent: August 3, 2010Assignee: Fujitsu LimitedInventors: Kimya Saito, Kenichi Utsumi, Reisuke Nakagawa, Hitomi Akiyama, Ichirou Sakuma, Hiroyasu Inagaki
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Publication number: 20080010396Abstract: In order to facilitate the management of the hardware key of a library apparatus employing the LTO system, a write function of a noncontact memory (CM: cartridge memory) contained in an LTO tape cartridge is implemented in a medium carrying mechanism part of the library apparatus, and during an insertion to a tape drive, the IDs unique to a library control part and to the medium carrying mechanism part are recorded in the non-contact memory and utilized as the hardware key of an encrypting apparatus. The hardware key written once is overwritten (erased) during an ejection, thereby preventing leakage of key information.Type: ApplicationFiled: September 14, 2007Publication date: January 10, 2008Applicant: FUJITSU LIMITEDInventors: Yoshiharu Itou, Kinya Saito, Kenichi Utsumi, Reisuke Nakagawa, Hitomi Akiyama, Ichirou Sakuma, Hiroyasu Inagaki
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Patent number: 7139147Abstract: A drive control apparatus receives an instruction from an upper unit, to mount a predetermined medium onto a predetermined drive unit. If a combination of the predetermined medium and the predetermined drive unit is determined as inappropriate, the drive control unit replies to the upper unit that the predetermined drive unit cannot be used. A combination of a medium and a drive is appropriate if both, the medium and the drive are suitable for any one of encrypted and unencrypted data.Type: GrantFiled: July 25, 2005Date of Patent: November 21, 2006Assignee: Fujitsu LimitedInventors: Mitsuru Yasue, Kinya Saito, Kenichi Utsumi, Reisuke Nakagawa, Hitomi Akiyama, Ichirou Sakuma, Hiroyasu Inagaki, Yoshiharu Itoh
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Publication number: 20060215305Abstract: A drive control apparatus receives an instruction from an upper unit, to mount a predetermined medium onto a predetermined drive unit. If a combination of the predetermined medium and the predetermined drive unit is determined as inappropriate, the drive control unit replies to the upper unit that the predetermined drive unit cannot be used. A combination of a medium and a drive is appropriate if both, the medium and the drive are suitable for any one of encrypted and unencrypted data.Type: ApplicationFiled: July 25, 2005Publication date: September 28, 2006Inventors: Mitsuru Yasue, Kinya Saito, Kenichi Utsumi, Reisuke Nakagawa, Hitomi Akiyama, Ichirou Sakuma, Hiroyasu Inagaki, Yoshiharu Itoh
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Publication number: 20060209446Abstract: Disclosed is a method, for erasing data from a magnetic tape storage medium (92) housed in a cartridge (86) containing a memory in which are stored the last written track position (yy) of the last written, most recent information and the last track position (xx) of past information written in the past and remaining unerased, comprising: the step of reading out of the memory (91) the last written track position of the most recent information and the last track position of the past information; the step (S124) of determining whether the data should be erased up to the last written track position of the most recent information or up to the last track position of the past information; and the step (S126, S128) of erasing the data up to the determined position, thereby shortening the data erase time of the magnetic tape while completely solving a security problem by making provisions to completely erase the data of the most recently written information or the data of the past information written in the past and reType: ApplicationFiled: July 8, 2005Publication date: September 21, 2006Applicant: FUJITSU LIMITEDInventors: Kinya Saito, Kenichi Utsumi, Reisuke Nakagawa, Hitomi Akiyama, Ichirou Sakuma, Hiroyasu Inagaki